.operation-div{
    /*border:1px solid red;*/
    width: 130px;
    height: 130px;
    left: 40px;
    bottom: 40px;
    position: absolute;
    background: #f2f5f74d;
    border-radius: 50%;
    z-index: 2;
}
.top-div:after {
    content: '';
    position: absolute;
    left: 53px;
    top: -12px;
    border: 12px solid red;
    border-color: transparent transparent rgb(48 107 118) transparent;
}
.left-div:after {
    content: '';
    position: absolute;
    left: -12px;
    top: 53px;
    border: 12px solid red;
    border-color: transparent rgb(48 107 118) transparent  transparent ;
}
.right-div:after {
    content: '';
    position: absolute;
    left: 118px;
    top: 53px;
    border: 12px solid red;
    border-color: transparent  transparent   transparent rgb(48 107 118) ;
}
.bottom-div:after {
    content: '';
    position: absolute;
    left: 53px;
    top: 118px;
    border: 12px solid red;
    border-color:rgb(48 107 118) transparent  transparent  transparent ;
}
.stop-div{
    width: 23px;
    height: 23px;
    position: absolute;
    margin: auto;
    top: 0px;
    left: 0px;
    right: 0px;
    bottom: 0px;
    background:rgb(48 107 118) ;
}
.amp:after{
    content: '\271A';
    left: -20px;
    top: -20px;
    position: absolute;
    text-align: center;
    font-size: 20px;
    font-weight: 800;
    color: rgb(48 107 118);
    cursor: pointer;
}
.reduce:after{
    content: '\2013';
    left: 120px;
    top: -34px;
    position: absolute;
    text-align: center;
    font-size: 34px;
    font-weight: 800;
    color: rgb(48 107 118);
    cursor: pointer;
}